NOTE: As their name suggests hints are not exactly BlazBlue: Calamity Trigger cheats, and are usually just simple (but very useful) tips on how you can unlock secret level, features, find hidden areas and such. Hopefully these will make playing BlazBlue: Calamity Trigger even more entertaining.

Achievements
Complete each achievement to get the allotted gamerscore.

100 Trials (20): [Ranked Match] Strive higher in Ranked Matches.
200 Trials (40): [Ranked Match] Strive even higher in Ranked Matches.
Activate Termination Protocol (30): Completed a 60+ hit combo using Nu.
Animation Conservation (20): Used Rapid Cancel over 100 times.
Bangarang! (20): Fought against Bang as Bang, and both activated the "Fu-Rin-Ka-Zan".
Be Gentle... It's My First Time. (10): [Ranked Match] Experience a Ranked Match.
Beautiful Arakune (20): Had a perfect match using Arakune.
Carpal Tunnel (20): Exceed a total playtime of 25 hours.
Cat-a-pult (10): Threw a Kaka kitten using Taokaka's "Kitty Litter Special!".
Dante (30): [ARCADE] Beat Arcade mode on the highest difficulty.
Designated Driver (30): Used Distortion Drive over 100 times.
Devil's Advocate (20): Used Ragna's "Gauntlet Hades" over 100 times.
Discouraging Finish! (30): Use an Astral Finish with every character.
Duh Dun DUNNN! (30): Saw the True Ending.
Greased Pig (10): Successfully escaped 50 throws.
Hands Where I Can See Them (30): [GALLERY] Collect more art!
Hat-Trick (10): In one match, successfully pulled off "Thirteen Orphans", "The Great Wheel", and "All Green".
Hello World ! (10): [STORY] Understand the truth of the story.
I Am the Just Sword (20): [ARCADE / SCORE ATTACK] Defeat Hakumen in Arcade / Score Attack mode.
I Can Rebuild Her... (10): As Carl, decommissioned Nirvana three times in one round.
I Like to Watch (10): [REPLAY THEATER] Collect replay data.
I'm Faster Than Anybody (20): [Ranked / Player Match] Get "First Strike" five times in a row.
In Living Color (10): Used all the color palettes of a single character.
Irresistible (10): Hit the opponent with Tager's "Spark Bolt" more than six times in one round.
It's Go Time (10): Performed your first Astral Heat.
It's over 10,000! (30): Dealt over 10,000 damage using Hakumen, without the use of an Astral Heat.
It's the Only Way to Be Sure (10): Performed a 20 hit combo after the round is over.
Legionnaire (20): Increase your level.
Leonidas (40): [SCORE ATTACK] Beat Score Attack mode.
Murakumo Activated... (20): [ARCADE / SCORE ATTACK] Defeat v-13 in Arcade / Score Attack mode.
Nothing's Gonna Keep You Down (30): Earned a Perfect victory 30 times.
Praetorian Guardsman (30): Increase your level even more.
Restraining Order (20): Used Barrier Burst over 30 times.
Ride the Icening (10): Used Musou Senshouzan or Tosshougeki over 20 times in one round, and finished the opponent off.
Ruler of Kagutsuchi (10): [Ranked Match / Player Match] Fight against different opponents.
Spoonful of Sugar (20): Stayed afloat for over 25 seconds with Rachel.
Stop Hitting Yourself (20): Used Counter Assault 30 times.
That Was Incredible! (10): [Ranked Match] Conquer a Ranked Match.
Their Numbers Count for Nothing (20): Performed an instant block 300 times.
This Is Important... (20): Heard Noel say, "Hands off the panda!" over 100 times.
This Just Got Real (20): Caused a Double Down to occur.
Victory Is an Illusion [ARCADE / SCORE ATTACK] (30): Defeated "Unlimited" Rachel.
Voyeur (10): [Player Match] Learn from the mistakes of others.
Wanderer (10): [Player Match] Experience a Player Match.
Warrior (30): [Player Match] Experience is power.
Welcome to the Azure Nightmare [ARCADE / SCORE ATTACK] (30): Defeated "Unlimited" Ragna, and obtained the power of darkness.
Words Hurt Too (30): Let an opponent get a 5,000 hit-point lead on you, then taunt you.
You Brute! (20): [Ranked Match] Win several Ranked Matches in a row.
You Never Forget Your First (10): Performed your first Barrier Crush.
You're the Best! Around! (20): [TRAINING] You still have much to learn.

Astral Heat
To unlock Astral Heat for a character, you have to complete arcade mode with them. Example: Completing Arcade mode with Taokaka unlocks her Astral Heat the next time you use her.